Basic: Mosfet

1. About Mosfet
Mosfet is the field-effect transistors (M etal O xide S emiconductor F ield E ffect T ransistor) is a special transistor structures and other activities with conventional transistors that we already know, there Mosfet operating principle is based on performance magnetic field effects to generate electricity, as components like input impedance greater than for amplifying the weak signal sources, Mosfet is used more in the Monitor source circuit, the source computer.

Field Effect Transistor Mosfet

2. Components and symbols of the Mosfet.

The symbol and pinout equivalent
between the MOSFET and Transistor

* Components of the Mosfet.

Structure of backward channel Mosfet P

• G: Gate referred to as the gate
• S: Source called a power pole
• D: Drain called drain
• Cocoon Mosfet transistor N has two pieces on the P type semiconductor N, between two layers of PN insulated by SiO 2 layer two pieces of semiconductor P is connected to the positive pole D and S, the transistor is connected to N thin layer above then check out the ultra G.
• Mosfet power is the maximum G S pole and the pole with the pole G D is extremely large, and the resistor between positive and negative D S depends on the voltage difference between the positive and negative G S (U GS)
• When the voltage U GS = 0 the resistance R DS is very large, when the voltage U GS> 0 => the effect of the magnetic field makes the resistance R DS decreases, the voltage U GS greater the smaller the resistance R DS .

3. The operating principle of the Mosfet

The circuit experiment.

Experiment operation of Mosfet

• Experiment: DC Power U D D via a light on D and S poles of the Mosfet Q (for Mosfet upon reverse polarization), we see no light bulbs means that no electric current through pole DS leg G not power.
• When the switch K1 closed, source-level U G on poles to voltage U GS GS> 0V => led lights Q1 => D light bulbs.
• When the switch K1 off, the voltage across capacitor C1 area (ceramic capacitor) remains the leading lights Q => show no electric current through ultra-GS.
• When the switch K2 is closed, the voltage across capacitor C1 area decreased by 0 => U GS = 0V => light is off
• => From the above experiments we found that applied voltage on pin G does not create the GS as in conventional transistors, but this voltage creates a magnetic field => making the resistance R DS decreases.

4. Measuring Mosfet test

• A Mosfet good: when measuring the impedance between the S and G with the G to D with extremely resistive (metal not measure up in both directions) and when G is the free electric resistance between D and S is immensely.

The test procedure is as follows:

Measuring Mosfet check back to see better.

• Step 1: Prepare to scale x1K W
• Step 2: Go for G a charge (to que que black on red G on S or D)
• Step 3: After loading a charge for G is measured between D and S (D que que red to black in S) => needle will go.
• Step 4: Chap G to D or G on S to exit power vacuum G.
• Step 5: After power vacuum out the DS as measured G needles to step 3.
• => Mosfet result is so good.

Measuring Mosfet reverse check that has been short

• Step 1: For clock x 1K scale W
• Measure between G and S or between G and D = 0 if the needle on the convolution W
• Measurement of the D and S, but both directions measured on needle = 0 W is the convolution DS

5. Application of the Mosfet in practice

Monitor the clock source of the Mosfet

Mosfet is used as a source of light the Monitor

The pulse power of the Monitor or computer, people often use pairs of IC components are oscillators and light Mosfet, ranging from IC to create a square pulse is brought to the foot of the Mosfet G, at the time of the pulse is voltage> 0V => Mosfet leading lights, the oscillator pulse = 0V disconnected Mosfet => generate such fluctuations will control the switching Mosfet form continuous electrical current continuously variable running through primary winding => generate varying magnetic field sensor on the secondary coil => gives the output voltage.

* Measured in circuit test Mosfet.
When the Mosfet in circuit testing, we only need to scale x1 W and measured between D and S => If a way to reverse metal needles measure up => Mosfet is normal, if on both clockwise = 0 W is Mosfet has been short-DS.

6. Common lookup table Mosfet
Instructions:

• Type of channel: P-Channel: the pros Mosfet, Mosfet N-Channel is backwards.
• Specifications: For example, 3A, 25W: the DS line and produce the maximum peak.

STT	Symbols	Type of channel	Specification
A	2SJ306	P-Channel	3A, 25W
2	2SJ307	P-Channel	6A, 30W
3	2SJ308	P-Channel	9A, 40W
4	2SK1038	N-Channel	5A, 50W
5	2SK1117	N-Channel	6A, 100W
6	2SK1118	N-Channel	6A, 45W
7	2SK1507	N-Channel	9A, 50W
8	2SK1531	N-Channel	15A, 150W
9	2SK1794	N-Channel	6A, 100W
10	2SK2038	N-Channel	5A, 125W
11	2SK2039	N-Channel	5A, 150W
12	2SK2134	N-Channel	13A, 70W
13	2SK2136	N-Channel	20A, 75W
14	2SK2141	N-Channel	6A, 35W
15	2SK2161	N-Channel	9A, 25W
16	2SK2333	N-FET	6A, 50W
17	2SK400	N-Channel	8A, 100W
18	2SK525	N-Channel	10A, 40W
19	2SK526	N-Channel	10A, 40W
20	2SK527	N-Channel	10A, 40W
21	2SK555	N-Channel	7A, 60W
22	2SK556	N-Channel	12A, 100W
23	2SK557	N-Channel	12A, 100W
24	2SK727	N-Channel	5A, 125W
25	2SK791	N-Channel	3A, 100W
26	2SK792	N-Channel	3A, 100W
27	2SK793	N-Channel	5A, 150W
28	2SK794	N-Channel	5A, 150W
29	BUZ90	N-Channel	5A, 70W
30	BUZ90A	N-Channel	4A, 70W
31	BUZ91	N-Channel	8A, 150W
32	BUZ 91A	N-Channel	8A, 150W
33	BUZ 92	N-Channel	3A, 80W
34	BUZ 93	N-Channel	3A, 80W
35	BUZ 94	N-Channel	8A, 125W
36	IRF 510	N-Channel	5A, 43W
37	IRF 520	N-Channel	9A, 60W
38	IRF 530	N-Channel	14A, 88W
39	IRF 540	N-Channel	28A, 150W
40	IRF 610	N-Channel	3A, 26W
41	IRF 620	N-Channel	5A, 50W
42	IRF 630	N-Channel	9A, 74W
43	IRF 634	N-Channel	8A, 74W
44	IRF 640	N-Channel	18A, 125W
45	IRF 710	N-Channel	2A, 36W
46	IRF 720	N-Channel	3A, 50W
47	IRF 730	N-Channel	5A, 74W
48	IRF 740	N-Channel	10A, 125W
49	IRF 820	N-Channel	2A, 50W
50	IRF 830	N-Channel	4A, 74W
51	IRF 840	N-Channel	8A, 125W
52	IRF 841	N-Channel	8A, 125W
53	IRF 842	N-Channel	7A, 125 W
54	IRF 843	N-Channel	7A, 125 W
55	IRF 9610	P-Channel	2A, 20W
56	IRF 9620	P-Channel	3A, 40W
57	IRF 9630	P-Channel	6A, 74W
58	IRF 9640	P-Channel	11A, 125W
59	IRFI 510G	N-Channel	4A, 27W
60	IRFI 520G	N-Channel	7A, 37W
61	IRFI 530G	N-Channel	10A, 42W
62	IRFI 540G	N-Channel	17A, 48W
63	IRFI 620G	N-Channel	4A, 30W
64	IRFI 630G	N-Channel	6A, 35W
65	IRFI 634G	N-Channel	6A, 35W
66	IRFI 640G	N-Channel	10A, 40W
67	IRFI 720G	N-Channel	3A, 30W
68	IRFI 730G	N-Channel	4A, 35W
69	IRFI 740G	N-Channel	5A, 40W
70	IRFI 820G	N-Channel	2A, 30W
71	IRFI 830G	N-Channel	3A, 35W
72	IRFI 840G	N-Channel	4A, 40W
73	IRFI 9620G	P-Channel	2A, 30W
74	IRFI 9630G	P-Channel	4A, 30W
75	IRFI 9640G	P-Channel	6A, 40W
76	IRFS 520	N-Channel	7A, 30W
77	IRFS 530	N-Channel	9A, 35W
78	IRFS 540	N-Channel	15A, 40W
79	IRFS 620	N-Channel	4A, 30W
80	IRFS 630	N-Channel	6A, 35W
81	IRFS 634	N-Channel	5A, 35W
82	IRFS 640	N-Channel	10A, 40W
83	IRFS 720	N-Channel	2A, 30W
84	IRFS 730	N-Channel	3A, 35W
85	IRFS 740	N-Channel	3A, 40W
86	IRFS 820	N-Channel	2A-30W
87	IRFS 830	N-Channel	3A-35W
88	IRFS 840	N-Channel	4A-40W
89	IRFS 9620	P-Channel	3A-30W
90	IRFS 9630	P-Channel	4A-35W
91	IRFS 9640	P-Channel	6A-40W
92	J177 (2SJ177)	P-Channel	0.5A-30W
93	J109 (2SJ109)	P-Channel	20mA, 0.2W
94	J113 (2SK113)	P-Channel	10A-100W
95	J114 (2SJ114)	P-Channel	8A-100W
96	J118 (2SJ118)	P-Channel	8A
97	J162 (2SJ162)	P-Channel	7A-100W
98	J339 (2SJ339)	P-Channel	25A-40W
99	K30A/2SK304 / 2SK30R	N-Channel	10mA, 1W
100	K214/2SK214	N-Channel	0.5A, 1W
101	K389/2SK389	N-Channel	20mA 1W
102	K399/2SK399	N-Channel	10-100
103	K413/2SK413	N-Channel	8A
104	K1058/2SK1058	N-Channel
105	K2221/2SK2221	N-Channel	8A-100W
106	MTP6N10	N-Channel	6A-50W
107	MTP6N55	N-Channel	6A-125W
108	MTP6N60	N-Channel	6A-125W
109	MTP7N20	N-Channel	7A-75W
110	MTP8N10	N-Channel	8A-75W
111	MTP8N12	N-Channel	8A-75W
112	MTP8N13	N-Channel	8A-75W
113	MTP8N14	N-Channel	8A-75W
114	MTP8N15	N-Channel	8A-75W
115	MTP8N18	N-Channel	8A-75W
116	MTP8N19	N-Channel	8A-75W
117	MTP8N20	N-Channel	8A-75W
118	MTP8N45	N-Channel	8A-125W
119	MTP8N46	N-Channel	8A-125W
120	MTP8N47	N-Channel	8A-125W
121	MTP8N48	N-Channel	8A-125W
122	MTP8N49	N-Channel	8A-125W
123	MTP8N50	N-Channel	8A-125W
124	MTP8N80	N-Channel	8A-75W